Interesting,..although EVF in serious camera systems has been a certainty for some time now as the EVF is much cheaper to make than SLR moving mirror design.
I can't see that it means either the end of the rangefinder or, sadly, the end of focus problems as the lens must still be actually brought to optimum focus on the image plane/sensor.
Hopefully, good EVF's will at last bring in true 2nd generation digital systems and finally displace the black plastic 35mm SLR which first apeared as the Canon T90 in the 1970's. Apart from wedging a sensor inside in place of film there has not been much innovation and the camera industry is very conservative with virtually each maker offering the same item in each market slot.
The downside, I fear, is that cameras are probably going to go the way of camcorders,...ie,...cheap and nasty manufacture with poor reliability and short life which ends because it costs more to fix than its supposedly worth. The manufacturers answer being,..'just buy a new one for more money'.....
Part of the problem with cameras now is that only one cultrure produces them and that culture is not very interrested in European feelings about photography and camera systems.
For me, that is the great hope and chance of the digital Leicas,...they take at least a small part of the camera industry back to Europe........
For my next digital system i would like good detachable EVF,..square sensor 24mm x 24mm,.....full sensor RAW,...horiz/vert JPEG by touch pad,......ability to use adaptors fro all 35mm lenses,....detachable sensor unit...